Examine source code of Single Pass

{
  "name": "Single Pass",
  "version": "1.15resigned1",
  "manifest_version": 2,
  "author": "Packetizer, Inc.",
  "icons": {
    "16": "singlepass_16.png",
    "19": "singlepass_19.png",
    "38": "singlepass_38.png",
    "48": "singlepass_48.png",
    "64": "singlepass_64.png",
    "128": "singlepass_128.png"
  },
  "description": "Single Pass will allow you to use a single password to generate passwords for all of your accounts, safely and securely.",
  "browser_action": {
    "default_icon": {
      "19": "singlepass_19.png",
      "32": "singlepass_38.png",
      "38": "singlepass_38.png",
      "64": "singlepass_38.png"
    },
    "default_title": "Single Pass",
    "default_popup": "SinglePass.html"
  },
  "permissions": [
    "tabs",
    "clipboardWrite"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{71e70760-2b05-4e4e-b474-81d23db00357}"
    }
  }
}